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3163 Randi (1981 QM)
Classification: Mars-crossing Asteroid          SPK-ID: 2003163
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3354580609707943 4.0648e-08  
a 2.392954345697089 9.8385e-09 au
q 1.590218520897908 9.8296e-08 au
i 3.087718780903139 5.513e-06 deg
node 194.0647037046186 8.3249e-05 deg
peri 121.5764204558674 8.3652e-05 deg
M 157.9193883881306 1.0239e-05 deg
tp 2457007.393069460923
(2014-Dec-15.89306946)
3.61e-05 JED
period 1352.072707306128
3.70
8.3385e-06
2.283e-08
d
yr
n .2662578706416348 1.6421e-09 deg/d
Q 3.19569017049627 1.3139e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1178  
   data-arc span      26067 days (71.37 yr)  
   first obs. used      1944-09-13  
   last obs. used      2016-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48953  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 17:58:45  

Additional Information
 Earth MOID = .579072 au 
 Jupiter MOID = 2.12451 au 
 T_jup = 3.450 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.0 mag n/a MPO365283  
rotation period rot_per 59.50 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/astero id/lightcurves.htm]

3163 Randi (1981 QM)          Discovered 1981-Aug-28 by Kowal, C. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1981 QM = 1944 RH = 1970 RK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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